Patents by Inventor Gunter Theis

Gunter Theis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the production of 4,4-isopropylidene-bis'(2,6-dibromophenol)
    Patent number: 4180684
    Abstract: 4,4'-isopropylidene-bis(2,6-dibromophenol) is produced by reacting 4,4'-isopropylidene diphenol with hydrogen bromide or a mixture of hydrogen bromide with up to an equimolar amount of free bromine in admixture with hydrogen peroxide and in the presence of water and an inert organic liquid.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: December 25, 1979
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Peter Kleinschmit, Eberhard Walter, Helmut Mechler, Gunter Theis, Brigitte Meiners